Crosswalks Between Patient-Reported Outcome Measures After Hip Arthroscopy

Area of Science:

• Orthopedics
• Biostatistics
• Health Outcomes Research

Background:

• Hip injuries, including femoroacetabular impingement syndrome (FAIS) and labral tears, are increasingly diagnosed and treated.
• Varied use of patient-reported outcome (PRO) scores hinders comparisons across studies.
• Standardizing PRO data is crucial for evaluating hip arthroscopy outcomes.

Purpose of the Study:

• To develop high-fidelity statistical crosswalks between commonly used hip-specific PROs.
• To enable direct comparison of outcomes data collected using different PRO instruments.
• To facilitate meta-analyses of hip arthroscopy outcomes for FAIS.

Main Methods:

• Retrospective cohort study of 677 patients undergoing hip arthroscopy for FAIS.
• Utilized Hip disability and Osteoarthritis Outcome Score (HOOS) and modified Harris Hip Score (mHHS) data.
• Applied equipercentile equating to generate statistical crosswalks between HOOS and mHHS.

Main Results:

• Equipercentile equating was statistically validated based on score correlation, unidimensionality, and population invariance.
• Successful crosswalks were created for converting HOOS to mHHS and vice versa.
• Bland-Altman plots confirmed the accuracy of the generated crosswalks, showing minimal score differences.

Conclusions:

• High-fidelity statistical crosswalks can be generated between different hip-specific PROs.
• These conversion factors allow for the pooling and meta-analysis of PRO data from diverse hip arthroscopy databases.
• This standardization improves the ability to compare treatment outcomes for FAIS.